To increment a count and sum all data using XSLT, you can
use XSLT 1.0 or XSLT 2.0 features depending on your specific requirements and
environment. Below are examples for both versions.
Example using XSLT 1.0
In XSLT 1.0, you typically use recursion and templates to
achieve this, as it doesn't have built-in support for aggregating values in a
straightforward way like XSLT 2.0.
Sample XML
xml
<data> <value>10</value> <value>20</value> <value>30</value> </data> |
XSLT 1.0 Stylesheet
xml
<xsl:stylesheet
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0"> <xsl:output method="xml"
indent="yes"/> <!-- Template to match the root
element --> <xsl:template match="/"> <result> <xsl:call-template
name="calculate-sum"> <xsl:with-param
name="nodes" select="//value"/> <xsl:with-param
name="sum" select="0"/> <xsl:with-param
name="count" select="0"/> </xsl:call-template> </result> </xsl:template> <!-- Recursive template to calculate
the sum and count --> <xsl:template
name="calculate-sum"> <xsl:param
name="nodes"/> <xsl:param
name="sum"/> <xsl:param
name="count"/> <xsl:choose> <xsl:when
test="count($nodes) = 0">
<total-sum><xsl:value-of
select="$sum"/></total-sum>
<total-count><xsl:value-of
select="$count"/></total-count> </xsl:when> <xsl:otherwise> <xsl:variable
name="first" select="$nodes[1]"/> <xsl:variable
name="rest" select="$nodes[position() > 1]"/> <xsl:call-template
name="calculate-sum"> <xsl:with-param
name="nodes" select="$rest"/> <xsl:with-param
name="sum" select="$sum + number($first)"/> <xsl:with-param
name="count" select="$count + 1"/> </xsl:call-template> </xsl:otherwise> </xsl:choose> </xsl:template> </xsl:stylesheet> |
Example using XSLT 2.0
In XSLT 2.0, you can use the sum() function and more
powerful XPath expressions, making the solution more straightforward.
Sample XML
Xml
<data> <value>10</value> <value>20</value> <value>30</value> </data> |
XSLT 2.0 Stylesheet
xml
<xsl:stylesheet
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="2.0"> <xsl:output method="xml"
indent="yes"/> <!-- Template to match the root
element --> <xsl:template match="/"> <result> <total-sum><xsl:value-of
select="sum(//value)"/></total-sum>
<total-count><xsl:value-of
select="count(//value)"/></total-count> </result> </xsl:template> </xsl:stylesheet> |
Explanation
XSLT 1.0
- Recursive
Template: The calculate-sum template processes each <value> node
recursively, adding its value to the running total (sum) and incrementing
the count (count).
- Base
Case: When no more nodes are left (count($nodes) = 0), it outputs the
final sum and count.
- Variables:
Temporary variables are used to hold the first node and the rest of the
nodes for each recursive step.
XSLT 2.0
- sum()
Function: The built-in sum() function calculates the sum of the <value>
elements.
- count()
Function: The count() function calculates the number of <value>
elements.
- XPath
Expressions: The XPath expressions (//value) are used to select the
relevant nodes for summation and counting directly.
Conclusion
Using XSLT 2.0 is generally more straightforward and less
error-prone for tasks like summing values and counting nodes due to its richer
feature set. XSLT 1.0 requires more verbose and complex templates to achieve
the same result but is still powerful for environments where only XSLT 1.0 is
supported.
<AlertMessage> |
XSLT 2.0 Stylesheet for count
xml
<!-- Total
Bill and Not Bill Payment Count Start --> |
XSLT 2.0 Stylesheet for summation
xml
<!-- Total
Bill Payment sum Start --> |
increment a count and do sum |
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